Can't find the proper operation to task.

[beni17nexus]

My problem is at the top of the upper cylinder. There is an offsetted(by 0.2mm) 2mm wide, 1mm deep circular groove which i want to mill out, but none of the operations give me a proper toolpath. I want to use a 2mm diameter ball endmill. Could you please suggest me what should I do? It's either gives me an empty toolpath error, or a wrong toolpath.

[LibertyMachine · Accepted solution]

Two toolpaths can work for you, although may require a bit of playing around.

Step one: Sketch a circle at the mid point of the two radii.

Using this sketch, you now can use 2D Contour or Trace. Set Compensation to OFF, and disable your horizontal lead-in/out. I'd suggest also turning on Ramp (if you use 2D Contour, it's on the last tab)

Run simulation well, looking for gouges in it's approach or retract

[jbthornhill]

I'm going to bump this back to the top because this only seems to function with ball and end mills. It will not drive the tool on center with a chamfer mill / spot drill. This is really frustrating, and it seems like something that could be easily fixed.

[LibertyMachine]

What solution did you arrive at for the ball mills, and can you share your file?
File > Export > Save to local folder. Return to thread and attach the .f3d file in your reply

[beni17nexus]

Solution: Used a 2mm flat end mill for the pocket (2d pcket), 2mm flat end mill for roughing(spiral) and a 2mm ball end for finishing(spiral). Only problem was i checked contact point boundary and this caused a groove in the pocket bottom. This is a rubber mold. In the upper plate I unchecked contact point boundary and i got the surface what i needed.

The edges are pretty burry I know, but this was my first attempt with a cnc mill and fusion360. Since I got a little better. "Upped the stakes"

Thanks for the help.